$25 COTTON AND WOOL SHODDY PICKERS IRON BEAMS &GIRDERS MACIIINERY HINGES PICKS Etc. WILL FIND TIIE The Best Paper for Them Now Published. Superb Illustrations LEADING MANUFACTURING ESTAB. LISHMENTS MACHINES TOOLS AND PROCESSES. Inventors and Patentees PATENTS BOILER SUPPLY Davis' Adjustable Spirit Level, scientific american, 1869-11-27

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